New-onset left bundle branch block (LBBB) following transcatheter aortic valve implantation (TAVI) is a common conduction disorder, sometimes transient. Conversely, the development of sustained ventricular tachycardia (VT) after TAVI is rare and its management is challenging. We report the case of a female patient with aortic stenosis treated with transcatheter self-expandable aortic valve implantation, who developed new-onset LBBB post-procedure. Several days later, the patient experienced hemodynamically tolerated slow VT with a right bundle branch morphology. She underwent an electrophysiological study, but slow VT was only transiently interrupted. Due to the persistence of slow VT, the patient was discharged with an external loop recorder, which revealed spontaneous resolution of VT and regression of LBBB after a few days.